Why are the new Google Apps on iOS so much nicer than on Android?

I personally believe that Google is trying too hard to conform to their Holo Design guidelines which restricts them from making beautiful apps. The apps on iOS look a lot cleaner and closer to Google Now in design language. Here are some examples:

Google Plus:
Ltor6_medium Fqzew_medium

YouTube:

Bqhdy_medium

F8kme_medium

Gmail:

2bbct_medium Jr60d_medium

Maps:

Bxzi1_medium Yphxj_medium

Only in Google Search/Now do they both look good. But this is only in Android 4.1+

Twvoz_medium 9f0os_medium

Do you guys think Google should try and replicate the iOS apps on Android or keep following Holo guidelines?