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Pearce PG-39 grip Extensions add 3 rounds and allow a 26 to carry 13+1 and give a little finger rest
On a 19, you'd have 18+1 (in less space than a Glock 17 mag) with the PG-13 Pearce grip extension
Often I also carry my 25 with a stock Glock 19 mag for 15+1, and a mag spacer. (Sometimes with a +3 extension for 18+1)
Of course at home I use a Glock 17 mag with that same extension for 20+1 in both my 26 and 19.
I don't think it is any harder to control at all than the shorter gripped 19 when I use a Glock 17+3 mag and mag spacer.
A 26 might be a little tougher to control if one only used a 10 round mag and +P+ heavy ammo.
I prefer critical Defense ammo.
The 19 doesn't go ankle holster as easily. I"m thinking of trading my 19 for a second 26.
The only thing you give up ... is the accessory rail, but I prefer internal lasers anyway.
So, 19 makes a better house gun if you want to mount a light on the rail, otherwise take a look at the 26.

I have a 19 and a 26, used to own 17, 17L, and all sizes of the .45, 10mm, and .40 ... If I could only have 1, I'd keep my 26 I carry daily (you can carry a 26 with a Glock 19 mag, or even a Glock 17 +3 mag, you can put an extended barrel [Glock 19 length] in a Glock 26)

The shorter 26 slide (blocky thick slide) makes it easier to carry than my 19 even with extended barrel and mags.

I get the cheapest stock sights, then upgrade to Advantage TACTICAL Sights
(I've used Meprolight and Triijicon and PT Night sights in the past, as well as stock sights and others, but I vastly prefer Advantage Tactical Sights with Yellow Front and Orange Rear on both my 19 and 26)