The first file is Version 11.1.2 which is also referred to as 11gR2
The second version is 11.1.*1*.2 wich is also referred to as 11gR1. The latest patchset for forms 11gR1 would be 220.127.116.11
The main difference is that the R1 bundle also contains discoverer (and portal) whereas 11gR2 contains just forms and reports.
So if you are using discoverer you might want to look at the R1 version (with the latest patchset) whereas if you are using just forms and reports you could use 11gR2 which basically would be equal to 18.104.22.168 for forms 11gR1 (which was never released).
Sounds confusing? Well it is named (Con)Fusion Middleware ;).
- if you are using discoverer too => you might want to use 11gR1 (with the latest patchset)
- if you are using just forms and reports => you might want to use 11gR2 (there is no patchset for that right now)