It is clear that both of these groups have separate markets before and early their debuts days obviously to not overlapped with each other. Lsf will be focus towards the international market, particularly in Japan and the West while Nj will be focusing their market domestically. Their concept alone proves this. We used to be in era where girl-teen crush was the only way to achieve international success at the time.
But now, both of this group kinda promoted opposite to what I expected. I'm not truly invested in these two groups but this is how I see them.
Lsf mostly promoting in Korea and to some extent Japan. The group has appeared on numerous variety shows and YT shows in Korea (I believe they are among the most active 4th gg in variety right now). Eunchae has been the MC for Music Bank, and they have even appeared on the SWF2.
While Newjeans not really appears in local variety shows but were sent to few major festivals (Lollapalooza, Super sonic, and few upcoming festivals too). The group also have their own line friends pop up store and few global brand deals promotion like coke and MCD in few countries.
It is interesting to see how the market of both of these two group kinda change even though not that much. I do slightly feel like Lsf is kinda like Twice and Nj is kinda like BP in term of their promotion and target market now.