Sleep sack vs swaddle

So baby has been sleeping swaddled at night- arms out since day 2. Naps he hasn’t been swaddled I think since about 2-3 weeks.

Well now he’s older it’s been so much more difficult to get him to fall asleep for naps. We always spend the day at grandmas on Saturdays. Of course which worries me that it will upset nap schedule. I brought a sleep sack with me (I got from my SIL, it’s a halo sleep sack with no arms. A light weight one) it’s a size medium though so a bit big.

Idk why a sack and not a swaddle but here we are. His first nap of the day he slept an 1.5hrs! Which is much better then the normal 25-30min at home -.- then second nap he wasn’t wearing it and slept for about 30min. Third nap was at home- took a while to put him to sleep but he was wearing the sack and slept almost 2 hrs! So we put him to sleep in the sack instead of his swaddle and we’ll see if he’ll sleep through the night. (Which usually isn’t an issue thankfully)

My point is has anyone noticed a difference in sleep between using the two?