Roller

Roller cams come with their own set of problems. They do not have the simplicity of the FT cam/lifter & have a lot more moving parts to fail.

Forums everywhere have people complaining about noisy/ticking hyd roller lifters. And those pesky little needle rollers. While it is pretty rare for a needle roller to s**t it self, it does happen & it can take out the engine. To avoid this possibility, you would use bushed rollers, more expense.....

So things to weigh up, pros & cons.

If you get a FT cam from one of the major cam grinders that has modern computerised grinders, Comp, Howards, Isky etc & have a set of factory lifters re-faced you should not have a failure.