Do these yield the same results?

Question

doing 10 reps using a 5 pound dumbell vs
doing 20 reps using a 2.5 lb dumbell. do they yield the same resuts/benefits? disregard the number of reps (im doing many more), im looking at the concept

Answer 1

Technically, one is strength training (increasing weight, maintaining reps) and the other is endurance training (increasing reps, maintianing resistance/weight).