Cladox

Hello everyone! I'm sure this has been answered, but I have a huge plan with a 98 Civic EX I bought that has a blown B18C1 block in it. One of my friends told me about doing a B18Head on a B20 Block Hybrid deal! I thought this was fascinating! B20 Blocks are cheap compared to a B18C1 block.

Any way, I wanted to know a few things before I go out and buy a B20 engine is what are the major difference between the B18 and B20. I don't wanna sound like I'm being lazy because as I post this I'm on google doing my research also, but some help would be amazing! Thank you and much appreciated.