I've done business with both companies and received excellent products and service from both. I don't think that will be an issue.

There are the "extra" charges associated with buying from Scotland that others have mentioned. For example, if you pay with a credit card there will almost certainly be a small, but not insignificant, international service charge levied by the issuing bank. Just make sure you are comparing apples to apples when you consider cost.

Finally, and most importantly, stay safe and thank you for your service. Post a pic of your new kilt, when you get a chance.