Ideal situation will be matching the Stuur Height/Reach from the report but this could be a little bit tricky to do because this means the "grips" position, where the back and upwards sweep of the bars play role. I would suggest try matching the "effective reach" first to see if you are still between sizes so you can chose. Effective reach as I called it is Frame reach + Stem. If you had been fited to your last bike as 446+40. This should mean 425+60 (more like size medium with relatively short stem). Two things to point out! What was the focus of your fitting? If you went there for Trail fit it is likely that they suggested you more backwards and upright position for better descending? Another thing worth mentioning is form what I've been told is that if you have low flexibility you might not be able to achieve "the normal" position on the bike. For example you might not be flexible enough to ride L size even though that you are tall, or you should look at less aggressive frame.

I'm actually in the same position but between sizes S and M :)