I need to get new speaker wire through the doors and want to run this by TDR gang. I will use 16ga and will need (2) runs of it in each door because both front & rear doors will use components with the crossovers under the rear seat. I bought this 16ga wire-
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Trouble is they sent me a different wire, still 16ga but twisted and then covered once again which makes it kinda fat and round verses more flat. Its this stuff-
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My plans are to pull the new wire using the old speaker wire and am wondering if
A- Using the old speaker wire to pull the new is a bad idea and…
B- I should try and use the fatter stuff or get them to send me what I ordered- the more flat wire.
I understand the twisted is supposed to be better but if its a nightmare to install I won't care for it.
Thanks in advance for any ideas!

Trouble is they sent me a different wire, still 16ga but twisted and then covered once again which makes it kinda fat and round verses more flat. Its this stuff-

My plans are to pull the new wire using the old speaker wire and am wondering if
A- Using the old speaker wire to pull the new is a bad idea and…
B- I should try and use the fatter stuff or get them to send me what I ordered- the more flat wire.
I understand the twisted is supposed to be better but if its a nightmare to install I won't care for it.
Thanks in advance for any ideas!