HSBC/Vanguard Funds vs ETF's

tel_

After some research, my initial thoughts are to either invest in HMWO or the newly-ish listed LGGG.

However, I do have a couple of small concerns:

1) Because both these ETF's do not include Emerging Markets, I take it most investors would include a side fund specifically offering EM's into their portfolio? This seems wise, but is it really necessary considering how HMWO's returns are very similar, to say, the Vanguard FTSE All Cap, HSBC FTSE All World?

2) Also, is it wise to plum for the even cheaper LGGG ETF at 0.11%, due to it only being launched in November 2018, and does not have enough long term figures yet to digest? Over 10+ years though, this would work out cheaper than HMWO (if ongoing charges remained the same).

https://www.morningstar.co.uk/uk/etf/snapshot/snapshot.aspx?id=0P0001F2M8

I shall be grateful if their are any other low cost, All World/Global All Caps worthy of researching. I have spent a fair bit of time on this, but as everyone can appreciate, there are so many in this field. Or are Vanguard/HSBC mentioned on MSE so much for a reason - they are considered the best of the best for us inexperienced DIY investors?