I'm certain you'll have a wonderful vacation either way. The sport is older in Finland, there are more courses and more players. I assume that there's more money for course maintenance as well, on average. To my eternal shame, I've yet to play a single round there so I can't really share any personal experiences, but if the Finns don't treat you right, I'll eat my hat.
As for other worthwhile courses to visit in Estonia (I'll skip some of the ones from my previous post):
* In/near Tallinn are the courses I mentioned in the above post. Männiku is very sandy (it runs around a man-made lake), but is otherwise a nice course. Keila has two courses: one is longer and more technical. The other (situated away from the first) is pretty easy to par, but the I love the nature there. Well worth a visit.
There's also a course in Saku that is not really worth it, if you have limited time: it's a technically good course, but the setting/nature is kind of desolate.
*Pärnu has a number of nice courses: inside Pärnu is the
Pärnu Jõekääru DG park. I've not played the
Valgeranna DG park, but I've been to the beach numerous times: it's wonderful. The name translates to White Beach and it certainly lives up to its name. It's also one of the most crowded beaches in Estonia on a hot day. Around Pärnu there are the
Tõstamaa DG park and the aforementioned
Jõulumäe DG park. Tõstamaa is an 18-hole course on the grounds of an old manor. It's mostly flat, but is surprisingly well thought out and executed. Jõulumäe is probably one of my favorite DG parks. It has 3 courses: red, yellow and blue. Red is proabably the hardest course in Estonia. Loads of mandos, long narrow straight shots etc. Yellow has 27 baskets and while some of them are definitely filler holes, most are very fun. The nature is also brilliant.
*The islands have some nice DG parks. I can vouch for
Pühalepa and
Karujärve. It probably doesn't make sense to include these in a shortish trip, but if you do decide to go, I recommend camping
here.
Randmäe course is on/around the camping grounds. Beautiful places to visit.
*Tartu and south-east Estonia have too many DG parks to mention.
Annikoru is a great course: very diverse with decent elevation changes and a good mix of technical and bomb holes.
Vooremäe is a super fun course with loads of downhill shots.
Kuutsemäe,
Tehvandi,
Valgjärve and
Mammaste are all very nice courses.
Alatskivi is a short and easy course, but it's on the grounds of the Alatskivi castle. The park around the castle is usually very well maintained and it's a pleasure to play in.
There are a bunch of others that I'm doing a disservice to by not mentioning them, but the ones above are the ones I can personally recommend.
PS! I've mostly linked to discgolfirajad.ee for my own convenience, but there's a good bit of info on this site too and I try to update/add stuff every now and then.