Depends on if you like powerhouse style macho frags. If you do, then go with Van Cleef PH - it's a super powerful, bitter green leather chypre, very austere. It is also one of the longest lasting scents I own, with huge sillage.
TSAR is somewhat similar, but is much woodier, a lot less intense, and is a fougere. Longevity is just average, as is projection. It also smells very green. Both frags are great, but I personally much prefer VCA.
Has anyone tried Eau de Tsar???