I currently have both a TFight 300 and 315 Dynacore in my bag and I'm totally loving the 300 more than the 315.
As a frame of reference, I'm coming off a year of using the Graphene Prestige MP. I made the switch after speaking with the owner of my local tennis shop. My main complaint was the fatigue I was getting from the GPMP after two hours of playing and of course wanting to have more spin, something that I couldn't quite get out of the 18x20 pattern of the MP. The swing weight wasn't much of an issue early on as I was in the honeymoon phase of the racquet and was loving the added plow-through I as getting. But this winter I just felt like I couldn't handle the overall weight of the GPMP, and my shots became later and later, and unmanageable.
The shop owner directed my attention toward the TTF300D saying I would not only benefit from the lower static weight, but also the decrease swing weight. He strung the stick up with RPM Blast 15g at 44#. I took to the courts the next day and all I could say was...WOW! Immediately I felt I could tame the lower swing weight, lower tension and full poly with awesome control, depth and massive spin. I don't use a dampener, and I truly loved the feel and the vibration wasn't as shocking as I may thought. I initially hit with it in stock dimensions and intend to leave it as is. Strung with overwrap the specs are 4 pts HL and 11.6 oz.
Now the reason I felt the 300 was better than the 315. Initially for me the 315 felt like the sweetspot was smaller. I was framing most shots even during the mini-tennis warmup. I preceded to keep at it for an hour and just couldn't shake the muted feeling I was getting. Yes it was definitely lighter than the MP in regards to swing weight, and I felt I could wield it better but it was the feel I was missing.
Obviously, my experience will vary from player to player, but for me the exact recipe for me was the TFight 300 Dynacore stock. After 3 hours of hitting the fatigue I was complaining about with the MP is a non-issue and by far the comfort, attainable spin and feel is where the racquet excels.
