It's amazing what happens when you ask!!!!
I just happen to have a full CMX unit sitting here waiting to go on a 2016 Yamaha YZ450FX, but the bikes have not got here yet. So I was thinking the front end on my 2015 Yamaha YZ450F KMS turbo bike is the same, so why not answer your question and my curiosity too. I have put over 30 hours on this bike with a 2016 TS ST. So I know how it rides and performs.
The first thing to do is weigh both front ends to see the weight difference. I did not think about the Raptor front end not using the axle so it's weight is heavier by 11oz. on the scale.
The Raptor front end is over 6lbs. heavier than the TS.
The quality of the Raptor components are nicely machined and the fitment is impeccable. Most of the joints are fitted male and female for a perfect fit and placement. The mounts and brackets provide a much stronger ski mount / spindle than the TS. MY BIG CONCERN IS: I have damaged many TS spindles, ski saddles, and fork clamps over the years. I have only replaced two sets of forks with all of these super hard hits. This Raptor front end is built so well that if you take a hard hit I do not see any weak points that could break away. The weakest point is the plastic ski saddle formed into the ski. You might get away with a ripped ski, but snapped forks are very probable. Time will truly tell.
The instructions were well written and had pictures to help along. There was no drilling required, but no user adjustment to caster angle like the TS. So if you do not like the ski pressure there is no adjustment.
The Raptor skis cover a little over 14" in width. Where the TS is 10" wide.
The axle bolt to bottom of the skag's are within 1/8", so it shouldn't change the track approach angle enough to feel the difference.
Both have poly bushings to protect the fork from the clamps, and both have about the same amount of fork travel.
With the round paddle track on the 2016 TS it is tipsy sitting on the hard floor with the TS ski. The Raptor twin skis sure help it stand up on its own.
Expect a full ride report after Christmas.