You will. I can't say I regretted buying the Alma DE PM but it is just that I use it in the evenings. It is ok though. I also have the Speedy 25 mono which fits the essentials but the one I very much enjoy is the Speedy 30 DE B. I can't fill it up. And if feels so strange as one would say that 5 cm is not such a big difference. The Speedy 25 Emp also seems to fit more than my mono 25. How strange is that???
I think sometimes it really depends on the material. Perhaps the leather has more give and stretches more. Or perhaps it's like the epi speedy 25 which when measured really is about 27 or so. Perhaps, the speedy 25 Emp is INDEED slightly bigger. I don't have a speedy emp. That is one heavy bag.