English or Bird which can be more useful in attacking?

It’s comparing apples to oranges.

The English is very flexible and versatile; what do you with that?

I would also argue experience in the Sicilian, d4 and e4 is a prerequisite because of the transpositions.

bird. english is more defensive.

In pretty much all of white's many setups after 1.f4 (leningrad, reversed classical dutch, stonewall attack, bird-larsen, etc.) alot of his plans are focused towards an attack on the black kingside.

the "English" 1.c4 is not an opening yet, it is just a move which can become nearly any opening under the sun. However, in general 1.c4 has a calmer and more strategic reputation compared to 1.f4 (although this isn't always the case).

I would definitely go for the bird if we're talking which is more attacking.

The english is a solid, positional and slow opening. Your aim is to expand on the queenside. If you are looking for kingside, checkmating attacks, bird is a much better option. However, it's not objectively as sound as the english.

Looking at OP's friends list (after only a few days on the site) is also a little concerning.

english is more positional, if you want an opening that's more aggressive, you should probably choose the bird

I prefer English myself- it’s an opening where both sides can play very strangely and still have a roughly equal position.

But the bird is more aggression oriented. It’s just that such aggression has limited ways to be carried out. 

There are fresh ideas in the English.

I have been experimenting and prepping with the Reversed Katalimov Sicilian where you get an early h4 in, skewer the queen, both bishops pointing at the opponents king then finish off with opposite castling for a chaotic game.

No theory.

I was +7 the first time trying it out but got flagged lol.

https://www.chess.com/game/live/43380584361

I agree. As white or black. You have lots of room for creative play

Wow! Nice one.

As black too, that’s bold and awesome. Thanks for sharing.

At some point, I need to getaway from the Reversed Botvinnik System and play the Sicilian outright against c4. 

Sicilian against c4? That's just a symmetrical english. You probably won't get the same dynamism you usually get in the sicilian.

Lol I don’t know the opening jargons.

I avoid symmetry to clarify the middle game planning. I find  imbalance easier to play for.

One thing I will say now that I have the English a year under my belt is that I appreciate it for the richness and entertainment.

In the same manner that the OP is inquiring, I use to play the Kings Gambit exclusively from 800-1200 but that was a one trick pony. Something I did not want to be.

That is completely fine. Probably good for your chess, too. I used to play like that, but then I became a boring person.