Done in the correct way there is not a huge difference in the 2 methods, babies are offered different foods, if they like it they eat it, if they don't like it they don't eat it. If they are full they stop, if the hungry they take more.
i dont think theres a huge difference in the 'healthiness' of both methods (like u have said both irely on parents offering healthy foods and listening to LO abt when to stop/preferences). but there is a huge difference in
how babies develop skills for eating with each method.
With BLW they learn how to hold/move/handle food, what will and wont crumble etc, how to use/manage the gag reflex etc and they develop motor skills like the pincer grip and hand eye co-ordination by feeding themselves before they learn to associate hunger and food where as with TW its the opposit.
there is also a big difference in how BLWs and TWs progression is controlled. TW is controlled by a parent- milk feeds r dropped and more meals/snacks r added until the transition is made from predominantly milk to predominantly solids. With BLW u continue to offer the same amount of milk until LO naturally drops their own feeds (hence the 'baby led' name i guess) it usually takes a lot longer to 'transition' with BLW than TW.
i'm not saying either is write or wrong. i s'pose it depends what ur own personally aims (or reasons for weaning) r: that ur LO starts actually eat/digesting solids and starts learning that solids will fulfill hunger instead of milk or that they learn how to handle food while keeping milk as their main source of nutriants and calories.
I personally prefer that Kian remains having more milk and i am happy for him not to b eating 3 full meals a day for a long time because i think there r more nutriants/cals in a milk feed than there would b in the same volume of solids but i have friends who find the predictability of TW and the fact they r in control more suited to their life style
each to their own. tis the same as some people finding a set rotuine useful and other people choosing to have more babyled schedule IMO. whatever works for u