If the toe es just kissing the end of the toe pocket, then it is fine, for some, the same size works, for some not, that is why you should "feel" the fit and maybe the same 45 is good enough in both models. If you have found a size that fits, then Good for you ! Not everyone finds a good fit. <I could not get a good pair of spyridons even though I love the model>.
Spyridon, for me, has the least, and not because I do not like the model, in fact, I wanted some so bad but they did not fit <tooooo wide for my 40> . The speed has more than the trek sole. About the classic/sprint, I have not tried them, should I?
I think the mod is fine with the treks, spyridon and komodos, because they have fabric between the toes, as for the mocs and trek ls, I think there should be some precautions because there is leather between the toes, not fabric; and I would think it is somehow different to stitch leather than fabric. Anyhow, post your results, those pictures help others.