I'm looking at getting my first DE razor, and am pretty sure I want to go with a Merkur-- not only on the advice of the famous mantic but also on their affordability-- and a long handled one, as I have larger hands. Long handled Merkurs seem to come in either Open Tooth or regular varieties. What is the real difference between them, besides construction? Is there a difference in performance/aggressiveness/technique? Which is better for a beginner?