On paper, the 3-5-2 V-style formation seems better, but based on 4 matches played (2 for each formation), the 4-3-3 gave better results.
I recommend you to start with the 3-5-2 V-style formation, and switch to 4-3-3 if the previous formation does not seem to work. Make sure you put the orders right; make adjustments during the match if required.