It boils down to whether you’ll be playing at the arcade or not. Obviously you can’t take a pad to the arcade.
Pad players tend to become depressed when going out somewhere, say a beach, and stumbles upon a SF4 cabinet at the arcade, where tons of cholos are playing, where one mediocre player is being cheered for owning all the lesser scrubs with his less-than flowchart Ken. The pad player will be all like, “this dude is ballz”, and challenge the scrub king, only to end up losing and walking away with his head down in shame because he “should have won” against such a terrible player, but his lack of arcade stick experience brought upon his demise.
By reading this post, I have instilled some obsessive compulsion within you. You will now be aware that there will be a slight off-chance you will be bumping into S/SFIV cabinets within your lifetime and feel inclined to buy a stick and learn how to play on it. Otherwise, you’ll never gain the recognition you deserve when it is YOU who is the actually the best at the arcade, but some cholo scrub is getting all the glory.