Drove both as rentals, exactly these spec you wanted.
For features and grown up feel, i10,
But if you gonna keep your wheels for longer than the finance and hope to one day pass on the car to sons/daughters, brio
Brio is also a subjective thing with the looks, some love some hate, also my dad drove the bro and said the front seats seats in the brio not supportive at all.
Tbh, I'd do what is best, rent a brio for a week, (Avis/budget sandton has ones) and rent a i10 for a week
To be fair both cars have their plus and minus points, I'd still go brio as it will last longer than the finance/warranty agreements
And as a Honda will hold up better in the long run.
But if I had to pick something with the most value for money, i10 as you get so much equipment
Tough one, but don't discount the brio because EVERYBODY on mybb hates it,
Try both and see for what you need it,
Also search my username I wrote a review on the brio when I got one as a rental when the Picanto saga was going on.....