I had been using the NXT Tour ball, but wanted some more spin on approach shots and around the green. So I conducted an 'on-course' test. I played a round using a Pro V1 and a Pro V1x.

I settled on the Pro V1x for the same reasons you described; good control and decent distance. The Pro V1 did feel softer, which I really liked, but my bad shots [ hooks & fades ] were not as severe. I also noticed I got some decent spin on approach shots, and shots with my wedges held the green nicely. 

BTW, I'm an old guy with a slower swing speed with a moderate tempo, and a fast transition. I did not see any significant loss of distance using the Pro V1x vs. the other balls I've tried this year NXT Tour, NXT Tour S, and DT SoLo.

If you play around with the online ball selection tool, Titleist implies the results you are seeing. Every fitting I've had (retake the online many times and one driving range fitting) has had me fitted for Pro-V1x and Pro-V1 as the preferred balls. I need a little help off the tee and with longer irons for distance and control. I've not really compared the 2 - I've always compared the -1x to other vendor balls and nothing is better regardless of speed rating of the ball, even with a driver speed around 90. Hopefully, the V1 and V1x give you the same control in your short game to justify to continue using the -V1 supply you have. 5 yards off the tee box is less important than getting the ball within 5 yards of the pin going for the green.