S13 SR20DET Intake Manifold, Greddy? Or ISIS Easy choice? I think not

[om3ga]

Youd think by just reading the title omg no brainer right go with the better brand if you can afford it!? Its not like that though, Im wondering which is better fitting it seems you have to do a little bit to get the greddy one to work correctly to i'm wondering if the ISIS one is the same way. Here are the things ive heard about each one.

S13 Greddy:
Change throttle body pulley to S14 one
Cut part of the Sheath on the throttle cable
Get a swivel adapter for the FPR

S13 ISIS:
Dremel part of the fuel rail so the bolt hole lines up with the manifold
Get shorter Throttle body bolts.

It seems to me like the ISIS one has less modifications to make it work? Or are those just extra things you have to do besides what is normally necessary for the Real Greddy manifold?
Im not concerned about the cost difference as much as i am the fitment and quality.

[RedricesilviaS14]

i just did the intake swap this week and i must say i spent the money on the ISIS and had to clean up each runner and the spot where the Iac goes
basically what you get is the intake casting without machine work hence the $400 in price difference, at first i was kind of pissed due to the fact that i never buy knock off products but after getting it in shape i am more that satisfied with it, i dont get the s14 throttle wheel swap though, i just used my KA s14 bracket and twisted it a little blasted it with rattle can black and you cant even tell