ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars vs Perfect Bar Original Peanut Butter Protein Bar
ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars edges ahead on a protein + calorie + rating blend. ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars scores higher in that blend because it offers more protein per serving (20g vs 17g), a lighter calorie hit (210 vs 330), more protein per 100 calories (9.5g vs 5.2g).
Full side-by-side of protein, calories, macros, and protein density for ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars and Perfect Bar Original Peanut Butter Protein Bar below.
ONE Brands
Wins on: Protein, Calories, Protein per 100 cal
Protein
20g
Calories
210
Protein per 100 cal
9.5g
Pros
- More protein per serving: 20g vs 17g.
- Lower calorie load: 210 calories vs 330.
- Better protein density: 9.5g protein per 100 calories.
Cons
- Weaker review score: 4.4 vs 4.7.
Perfect Bar
Wins on: Sugar, Fiber, Carbs, Fat

Protein
17g
Calories
330
Protein per 100 cal
5.2g
Pros
- Stronger shopper rating: 4.7 vs 4.4.
Cons
- Less protein per serving: 17g vs 20g.
- Higher calorie count: 330 vs 210.
| Metric | ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars | Perfect Bar Original Peanut Butter Protein Bar |
|---|---|---|
| Protein | 20gBest | 17g |
| Calories | 210Best | 330 |
| Sugar | — | 18gBest |
| Fiber | — | 3gBest |
| Sodium | — | — |
| Carbs | — | 25gBest |
| Fat | — | 18gBest |
| Protein per 100 cal | 9.5gBest | 5.2g |
“Healthier” depends on your goal — here’s the real winner on every number we track, so two people with different priorities can both get the right answer.
- Protein: ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars wins, 20g vs 17g.
- Calories: ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars wins, 210 vs 330.
- Sugar: Perfect Bar Original Peanut Butter Protein Bar wins, 18g vs —.
- Fiber: Perfect Bar Original Peanut Butter Protein Bar wins, 3g vs —.
- Carbs: Perfect Bar Original Peanut Butter Protein Bar wins, 25g vs —.
- Fat: Perfect Bar Original Peanut Butter Protein Bar wins, 18g vs —.
- Protein per 100 cal: ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars wins, 9.5g vs 5.2g.
ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars edges ahead on a protein + calorie + rating blend.
ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars scores higher in that blend because it offers more protein per serving (20g vs 17g), a lighter calorie hit (210 vs 330), more protein per 100 calories (9.5g vs 5.2g). This blend won’t match your priorities if sugar, carbs, or diet fit matter more to you than protein, calories, and rating.
Frequently Asked Questions
ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars has more protein per serving: 20g versus 17g.
ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars is the lighter option at 210 calories, compared with 330 calories for the alternative.
ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars is the more protein-dense pick at about 9.5g of protein per 100 calories.
"Healthier" depends on your goal: ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars has more protein (20g vs 17g); ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars is lower in calories (210 vs 330). Neither is objectively the "healthiest" for everyone — see the pick-by-priority breakdown above, or try our free AI Snack Finder to get matched to your specific goal.
ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars edges ahead on a protein + calorie + rating blend. ONE Brands **ONE BARS** Birthday Cake Flavored Protein Bars scores higher in that blend because it offers more protein per serving (20g vs 17g), a lighter calorie hit (210 vs 330), more protein per 100 calories (9.5g vs 5.2g). Because they are in the same category, this is a direct apples-to-apples comparison.
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