you can see here the m5 with adapter and with the 40mm attached compared to the sl1 with just the 40mm
it's thicker...as i said, aside from the 22f2, there's no other lenses that are faster than f3.5 and have AF...with an SL1, you can add a 40mm f2.8, or a 50mm f1.8...and still be relatively small...that was his point...there are no options for that with the m5
I can see why it's a tad bigger now, that back screen looks like it may have some thickness to it.
The EOS-M has always been a minimal lens system, and I mention to folks they should be well aware of that when you get into it. Canon simply doesnt care enough about that lineup, while other manufacturers, that's their bread and butter. If you're looking for dead simple compliment, then canon can provide that, I think that's canon's strategy anyhow. If you want a DSLR replacement, look elsewhere.