There are some major issues with the Replicate system: a paucity of actual cases (I also can't see any long term follow-ups); and the fact that the actual implant is a dark grey - this unpleasant discoloration will show through gums.

BioImplant has a long history, with comprehensive case histories and follow-ups readily viewable on the website. This is very important for medical credibility. (I worked with the creator of BioImplant.)

On the other hand, Replicate Tooth has a very nice website!