No ITST isn't less competitive, If you want, you can do both tours. If you like to make your own stats and most likely play a bunch of long rallies, mg is the tour for you. If you like using real pros and having slightly shorter and more offensive rallies, go to ITST. I personally think both tours have their advantages.
tour rank: (singles)20 (Doubles)10
Biggest wins: doubles: def. Quasar 6-4 2-6 1-6 7-6(7) 12-10 Wimbledon r2
Singles: def. Sampreas 6-4 4-6 7-6(8)