I have. Found the pk more solid overall stringbeds and more predictable, maybe a slight bit more power from center of stringbeds on yonex. They both have a nice muted solid thud when you hit tho. Arm friendly always goes to PK. even tho the lay up is stiffer, the sand absorbs some of that initial impact force. the DR is much stiffer than the specs suggest, it's feels more like a 65 or 66 (quite similar feel to new pure strike actually). Always had issues controlling my forehand with the yonex. The yonex swings heavier and less maneuverable. Both of them disappointed me on serves tho, and yonex on topspin groundstrokes. I now use a pure aero lite, with 4g lead at 3/9, and a shock shield replacement grip and overgrip, 4 grams of blue tac in butt,and babolat RVS dampener and gamma worm. That combo comes in at 330 grams, 6 pts head light, estimated swingweight around 325. More solid than both the pk and yonex, every bit as comfortable, much better spin, more stability across the face of the racket on mishits,and more maneuverable. I keep a ki5 280 with some lead in my bag (similar specs after mods as the pure aero above), it is also more solid (with the mods) than the 320 or DR, and most importantly it serves better. Spin isn't as much as the babolat obviously, but it is much more predictable and I'd say a little more powerful, but that may just be because it doesn't hit as loopy a ball. To me it is 95% of a pure strike in terms of power and spin, but without the harshness.
I'm sure with weight at 3/9 the 320 and DR would be more solid, but they get too heavy for me to use as effectively and I ironically get arm pain from heavier rackets (pk ki5 pse is what flared my biceps pain after being pain free with a 5g for a decade). If you like the 320, I highly recommend getting the 280 and adding some weight to the hoop, it is the most solid pk I've hit since the ki5 PSE (that list includes (with lead on all of these in varkous amounts) 5g, Redondo 98, previous ki5 315, previous ki5 280, q5 295, q5 315, ki10, qtour 325, 300, and 295. ) If you don't want to mess around with customizing, the new pure strike 98 is better than the 320 and DR, better spin, better power, better stability than DR, feels maybe a touch less than the 320 but close, better serves. For me it was the smaller sweetspot compared to my modded pure aero lite and ki5280 that led me to sell it, it was too heavy for me to add lead to. But it would be my pick of all the rackets on the market in the 305g and heavier section