Thanks for the feedback. However, if you have never played with the 4D 100 then how do you know that the Bio 100 has a higher swingweight? The specs don't always tell the story so only by playing with racquets can one determine how easily if swings and how flexible it feels.
Also, can you please elaborate on why you prefer the 4D 200 Tour much more than the Bio 200 Tour?
Thanks.
I admit, I'm basing the 'plow' comment on the difference between the published swingweights (4d100 308 SW vs Bio100 323 SW). This would be under the assumption a play tester received a demo of each that measured out to spec. Given the same static weight, but higher swingweight, there should be more mass in the head, or high enough on the frame to notice a slight difference in plow. Not saying one is better or swings in a more desirable manner, I was just commenting on the potential to hit a heavier ball. I think it'd be slight. On the other hand, as we know, a lower SW might encourage or allow you to whip through the stroke faster, imparting more spin.
The HL balance drop from 8 pts to 5 (4d to Bio) confirms the mass redistribution, but you're right, I can't claim to truly prefer the Bio over the 4d without actually playing both.
As for the 4d vs Bio 200 Tour, the 4d has a noticeably higher (published) swingweight while weighing .2 oz less, although I gave up trying to notice a difference. Did the extra static weight somehow negate the drop in SW, making them both feel similar during the swing (pre ball-impact, I mean)?
On groundstrokes, I felt there was a little more stability/solidity compared to the Bio, even though the 4d weighs less (all this assuming specs are accurate for the demo). And the 4d just felt a little more flexible, which isn't necessarily reflected in the 61 vs 62 RDC rating. How much did the string job/differences affect my experience? Maybe it accounts for most of the differences...
The Bio 200T still hit big, though. I know for certain that a good set of strings and additional time would have been enough for me to adjust to it.
It's just that the Bio 200T wasn't offering enough improvements (other than maybe kick-serves) to make me want to trade out my 4ds'.
One thing I have to say, is that I have scared myself serving huge with the 4d 200T. With a live/loose arm, that racquet hits massive serves. Better than my PDR+, no question.
That said, I also served really well with the Bio 200T demo, and felt there was a slight increase in kick on the twist-kickers... and with syn gut no less. The difference in serve between the 200Ts and 100 is what's making me want to beef up the 100. I get nice spin out of the 100 and great targeting, but I think more mass is needed to bring the epic heat.