I wouldn't say that.
1. PL-15 is competitive or superior to AIM-120D variants, and the AIM-260 was developed partly informed by PL-15 as a response to it. We don't know if AIM-260 is comparable to PL-15 or if it may even be superior. However we do know that AIM-260 should have a AIM-120C/D footprint meaning it's a bit smaller than PL-15
2. PL-16 should have a smaller footprint than PL-15, but it should also be more capable than PL-15
3. PL-17 is a larger class of AAM than AIM-120D, PL-15 or AIM-260 or PL-16, both in terms of range and in terms of footprint.
- In terms of size/footprint (not necessarily capability only), PL-17 >>>> PL-15 > AIM-120C/D = AIM-260 = PL-16