If you need verified information, I can indicate that I have 2014 HP4 front forks and 2012 front forks in my 15 and 18 triples. So, yes. the fork tubes all interchange in size among the triple clamps and the clip ons.
Riding and loving my 2020 K67 with the custom XWORKS ECU
Check out MotoMillion ( forum Vendor section ) for all your needs in ECU work
Check out MotoMillion also has programming for RCK3 / HP power Kit enables now
Programmer for MotoMillion is myself ( BMW_388 )
I personally own the 2014, 2015, 2018, 2020 S1000RR
This makes for checking my ECU work is perfect every time sold by MotoMillion