Hmm, this or 745.

I have a 745 (my everyday watch), and wondered what differences I'd notice if I got a 255.

Yeah, I just got a 745 a few days ago and I'm wondering the same. 

If you cans still return it for a 255... In your shoes I would, series 7 seems sentenced to death by this 255 and the very short list of differences with the 955, there seems to be no space in between for a possible 755, hence 745 will end up as the 645... Abandoned by Garmin.

Of course, this is just my personal feeling, I have no official information of any kind 

I’d definitely get the 255. As others have said it doesn’t really make much sense for the more expensive model. 

Also as it’s the newer watch you should in theory get updates for years to come, same as the 9 series. 

If you look at the 645 from a few years ago, it fell off the update list relatively quickly whereas the 245 got many. 

The lower and higher end watches get updates for a considerable time, mid range far shorter. 

Does anyone know when Garmin will release in Canada ? 

I did exchange the 745 for 255s music 745 was better size overall ! The new sensors and features on 255 are worth it IMO.