As much as I am inclined to say that both the schools are equally good, I picked Deens Gunjur for my son.
Deens Gunjur has started only this year while Chrysalis has been there for 4 years(I think) hence you will find obvious differences.
So an apples to apples comparison would be Deens ECC vs Chrysalis Varthur. Deens Gunjur has the same dna and in a couple years, I am very sure it will be one of the hottest schools in town.
Good very good reviews in Chrysalis yelahanka branch. not sure on varthur branch.