They will be exactly the same so, yes, you can do the swap
Out of interest, why the swap
All swing arms are interchangeable from the 1993 model to the last TTRs made. The only difference being the chain guard supports as the metal-tanked models had a shorter guard than the later plastic-tanked models.
The Raid has an all-steel swing arm and a shorter rear axle. These can be upgraded to the alloy swing arm but will need the matching length axle to go with it.
Brian
PS Welcome to the forum! I just noticed it was your first post
If so, there is another £41 carriage on top plus VAT when imported
Also the US swing arm has a different 3-bolt chain guide underneath so it would need one of those added to the shopping list. The UK swing arms have a 2-bolt chain guide.
Brian
PS Don't cut down on the ale and pasties - the extra weight helps with grip on those slippery LDT sections
PPS The TTR is perfect for LDTs - I got an MCC Triple Award in my cabinet to prove it