Side-by-side comparison

Paula's Choice Clinical Azelaic Acid Booster vs Tower 28 SOS Daily Rescue Facial Spray

Both are treatments. They share a 50% active-ingredient overlap, so the real decision is about price, texture and the supporting ingredients. Here's the side-by-side.

50%Active overlap
Paula's Choice
Clinical Azelaic Acid Booster
TreatmentPremiumMorning or evening
RednessPost-Acne MarksCongestion

A 10% azelaic acid booster with salicylic acid and adenosine, mixable into moisturiser, for redness, bumps and tone. A cosmetically elegant azelaic option; the dual-acid combination is effective but worth easing into.

Full analysis →Find dupes →
Tower 28
SOS Daily Rescue Facial Spray
TreatmentPremiumMorning or evening
sensitiveAcneRednessDamaged Barrier

A hypochlorous acid spray — the same antimicrobial chemistry used in medical wound care. Good for acne-prone skin, eczema flares, post-shave, post-workout. Not a substitute for a treatment serum; a useful topical peacekeeper.

Full analysis →Find dupes →
The verdict

Which should you choose?

Both sit in the Premium tier, so cost isn't the deciding factor here — choose on texture, finish and the supporting ingredients. The Paula's Choice leans toward Congestion, Post-Acne Marks. The Tower 28 leans toward Acne, Damaged Barrier, sensitive.

The overlap

What they share

Both are treatments built for the same job. They register a 50% match on active profile — close enough that one can stand in for the other, with the difference coming down to texture and feel.

The formulation

Ingredient stacks, side by side

Paula's Choice — top of the list

  • Aqua~50–80%
  • Azelaic Acid~5–25%
  • Dimethicone~3–10%
  • Glycerin~2–6%
  • Salicylic Acid~1.5–4%

Tower 28 — top of the list

  • Electrolyzed W…~50–80%
  • Sodium Chloride~5–25%
  • Hypochlorous A…~3–10%

● marks ingredients that appear near the top of both lists. Percentages are positional estimates from INCI order, not disclosed doses.

At a glance

The specs

Paula's ChoiceTower 28
CategoryTreatmentTreatment
Price tierPremiumPremium
Best forRedness, Post-Acne Marks, Congestionsensitive, Acne, Redness
Usage notesMorning or eveningMorning or evening
Active overlap50% — a similar active profile
Questions

Common questions

Is the Paula's Choice Clinical Azelaic Acid Booster or the Tower 28 SOS Daily Rescue Facial Spray better?
Neither is clearly better — they overlap 50% on active ingredients and sit in the same price tier. The difference comes down to texture, finish and the supporting ingredients, so the right choice depends on your skin type and preferences.
What's the difference between the Paula's Choice Clinical Azelaic Acid Booster and the Tower 28 SOS Daily Rescue Facial Spray?
Both are treatments that share a similar active profile. Where they differ: the Paula's Choice targets Congestion, Post-Acne Marks; the Tower 28 targets Acne, Damaged Barrier.
Are the Paula's Choice Clinical Azelaic Acid Booster and Tower 28 SOS Daily Rescue Facial Spray dupes for each other?
They share 50% active-ingredient overlap based on published INCI lists, so one can stand in for the other on the actives that matter. A dupe matches the hero actives, not the full sensory experience, so expect differences in texture, fragrance and exact concentrations.
Can I use the Paula's Choice Clinical Azelaic Acid Booster and Tower 28 SOS Daily Rescue Facial Spray together?
They both fill the treatment slot in a routine, so you'd normally pick one rather than layer both. If you want to use both, treat one as your daytime option and the other for evening, and patch-test when introducing anything new.
Keep comparing

Related comparisons

Paula's Choice Clinical Azelaic Acid Booster vs The Ordinary Azelaic Acid Suspension 10%
70% overlapLa Roche-Posay Effaclar Duo+ vs Paula's Choice Clinical Azelaic Acid Booster
66% overlapCeraVe Acne Control Gel (2% Salicylic Acid) vs Paula's Choice Clinical Azelaic Acid Booster
64% overlapNaturium Azelaic Topical Acid 10% vs Paula's Choice Clinical Azelaic Acid Booster
64% overlapBiodance Bio-Collagen Real Deep Mask vs Tower 28 SOS Daily Rescue Facial Spray
50% overlapDifferin Adapalene Gel 0.1% vs Tower 28 SOS Daily Rescue Facial Spray
50% overlap

Want a deeper, personalised read? Drop both products into the live comparison tool for an ingredient-by-ingredient breakdown tuned to your skin profile.

Compare these yourself →