FatBottomedGirl

Hello.

I am riding clipless with the MT43 shoes I bought at my LBS.
They are great,... when it is not cold outside... and now it is cold outside... and my toes are freezing.
I was thinking of getting Shimano MW81 Gore-Tex Winter SPD Boots but my LBS does not sell it and is not willing to order (they're promoting their own brand and only sell two Shimano references).
So I was considering buying online.
I know Shimano is know to have "funny" sizing, and that one usually needs one size or two over one's usual size.
The thing is, my MT43s fit perfectly (tried 4 different sizes at the LBS) and I ended up with EU 46 size while I usually wear for city and sports shoes 46 to 48 depending on the brand which feels weird since Shimano shoes usually require one size over the usual...

And now for my upcoming MW81: can I rely on my MT43 experience and get the same size? or should I get one size higher? (or should I order both and return the one that does not fit... but that wold cost me some extra postage)?

Also, the 46-48 non-Shimano-shoe-size I had mentionned earlier was already true over a year ago and since then, I lost 80 pounds and when I look at my feet, they do look a little skinnier (I can now see some veins and bones which was not the case before), can this mean that I might have dropped to 45 for usual urban and 46 for Shimano? I mean my old urban shoes still fit and I have not felt much of a difference but I had to toss that idea in the pool...

Thank you all!