Firstly enjoy your test drives and I think you will be surprised at the difference in character of the two machines.
Both are up to long distance adventures, many M3Ws have been used for extensive UK and European trips and have many 10s of thousand miles on them. I've done over 36,000 miles in my 2021 M3W including a trip to Istanbul earlier this year with two other M3Ws.
If you do decide to look further at one or the other then there's a wealth of help, advice and opinions on here but it's probably more important to research the M3W if you a interested in getting one of these. They do have a list of known "issues" along with well proven fixes. The earlier the car the more upgrades you should check have been done or budget for if you plan to use the car.
The Super3 being a newer car has a smaller list of things to look out for and of course is still in production.
Do have fun tomorrow and let us know your thoughts on the cars.
