I'm not sure how the 3060ti and 3070 compare. You'd have to check some benchmark reviews. GamerNexus probably has a review on the 3060ti.if you search thier YouTube channel.For the graphics card. Extreme PC (who I plan to do the build for me) does not have the ASUS or EVGA 3060 cards listed.
They do however have these listed;
ASUS DUAL-RTX3070-O8G GRAPHICS CARD | NVIDIA® GeForce RTX™ 3070 GPU
ASUS ROG-STRIX-RTX3070-8G-GAMING GRAPHICS CARD | NVIDIA® GeForce RTX™ 3070 GPU
ASUS TUF-RTX3070-O8G-GAMING GRAPHICS CARD | NVIDIA® GeForce RTX™ 3070 GPU
all roughly listed at $200 more than the MSI GeForce RTX 3060 Ti I currently have picked. Any worth the $$?