Okay, so the reasons I prefer my Soto New River Pot to the Toaks ultralight (or superlight or whatever they call it) 700ml titanium pot are as follows.
Firstly, there have been one or two occasions (though I can't now remember quite what) when I felt it would be good to have a slightly larger pot. Doing actual cooking rather than just hot drinks and rehydrating.
Secondly, for anything other than boiling water, aluminium is easier to cook in. Things burn in titanium in a way they wouldn't in aluminium (though this might be in part down to my poor cooking skills). And for the same reason I have the vague impression that boiling water is actually slightly quicker in the aluminium pot, thus saving (a no doubt minuscule amount of) fuel.
Thirdly, although the Soto is larger and heavier, it is easier to pack. This is because my mug, Opinel, freezer bag containing tea bags, washing up sponge, all fit neatly inside it. The mug at least is too tall to fit in the Toaks. So using the Soto is not so much a space saver as a faff saver. I know that things I want are inside it (and if I'm getting my cook kit out, I want a cup of tea! YMMV... )
Downsides: It's bigger. Possibly the ease of packing allows me to be a bit lazy in packing? And of course it's quite a lot heavier: 144g v 89g. Though in terms of grams per cc it's closer: 0.144 v 0.127.
I'm not bothered by the plastic lid. I really don't think it's going to melt unless it gets dropped in a flame. It seems pretty strong, I'm not worried it will break in my pack. And if I should accidentally step on it (and I'm not convinced even that would totally destroy it), it has the exact same diameter as the Toaks lid! Although the Toaks titanium lid is actually 2g heavier!