@Mo1959 thats much more like I expect you to be doing, for there only to be 5ft/mile between you and me when I look at my rides is so wrong. Try this make one a segment for the whole of your ride and I bet its closer to rwgps. I did export one of mine from garmin connect that I had uploaded from the tcx file exported from the bryton and it still was only about the same as bryton said (they tend to be very similar). Its worth a go Mo.
Well the two days yesterday and to day couldn't be much closer in performance and elevation ect.. (these are daily totals 2 rides each day, I joined the two today, as i was away from home),
@Mo1959 these were exported from garmin and strava as given me 1004ft bryton gives a total of 898 for the two rides, rwgps 1328ft,
So I guess it might work Mo,
Just correct the elevation, to late
@Supersuperleeds pointed you there, Chris, I did note last year that when you correct a file from a fit format, you do tend to get some spikes as in peaks and troughs.
The ridewithgps elevation looks wrong, it has you going to -376 feet at one point
its when I cant correct those I worry, only 172ft above sea level 4 miles away its 30ft.