They are similar but HOP is more "cringe" as Alvin and the Chipmunks II (because of the dumb relations between the main character and E.B. Jr.
Also HOP is more musical and has a dumb final fight scene with drums.
Peter Rabbit doesn't have a musical aspect nor has that kind of dumb "final fight". Infact, the battles in Peter Rabbit are sometimes very funny.
Animation Wise and interaction wise. I think both do good but HOP is better in that department.
For being sony's 4th "live action" with CGI characters (After the horrible smurfs franchise).. the progress wasnt that good. HOP was Illumination's first and they did pretty well.
Enviroment wise.. HOP is better. More variation.
Dialog wise, Peter Rabbit is a trainwreck.
While HOP's interactions between the loser guy and E.B. is absolutely terrible (worse than David Cross's interactions with the chipmunks trio).. The rest is very decent.
Peter Rabbit is.. I don't know.. they like.. tried to make the whole dialog as easy to digest to very young kids.. and feels so forced and unatural. At least in the Spanish dub. Very weird considering the amount of cartoony violence, indirect stuff like the fox being a nudist party goer and death references to some characters)
I give:
- HOP 3 and half stars.. ------------- 3 1/2
- Peter Rabbit is 2 and half. --------------- 2 1/2
- Alvin and the Chipmunks 1 is 3 stars, Alvin and the Chipmunks II is 1 star and half, Alvin and the Chipmunks III is 3 stars, Alvin and the Chipmunks IV is 3 stars and half. ----------------- 3, 1 1/2, 3, 3 1/2.