the length changes by approx 1 cm - everything else remains the same.
and you have to remember that while this might seem like a small change, it does depend on who you are and how long you normally get out of it. For instance, i use one ego batt per day - i usually pick it up at around 8pm in the evening,
vape until 5-8 pm the next evening before mine goes dead. So yes, for me i could argue it wouldnt be worth it.
For others who only get around 6 hours + out of it, this could mean they get that one extra hour'ish, so for them it could be very well worth it.
Not to mention there are some things to be said for having the XL as a spare, for travelling and so on.
And the size feels right actually - i cant honestly say i prefer the XL or the non XL, they both feel really good in weight and length as they are.
But, its coming - if you want / down want one, is entirely up to you
