I've had 2 different brands, and once the wire is placed just right, it just works.
Placing the wire is not that much work in the first place, and then some minor adjustments in the first few days or weeks to get around corners better. Easy.
Yes it's still quite big, but not nearly as big as Australia (as Mercator would suggest). On a globe it is quite obvious, but who has a globe at home in 2025...
If you can only choose between those two, I would prefer karate, mostly because later in the sporting career tae kwon do becomes excessively violent (to the point of complete knockout and worse) whereas karate remains softer.
But at a young age, the spirit and the style of the dojo are much more important, so try both and then choose the one that has a better feeling.
My son attended a different variety at that age, and we hoped there would be focus on discipline and spirit - but there was none at all, it was just about kicking things. Very bad trainers with no people skills. So we took him out from that again. Turns out swimming was his thing - just had to discover it.
America-centric. Other countries split the education path in different sections.