Installing Dedicated Lines.... Need advise

My two lines run to the same place. Maybe separating them has sonic value, it could make sense logically but, maybe not technically. Engineers chime in. I don't really buy into significant differences in high end outlets. I use the same Furutech for both of mine, have swapped amp. TT, tuner, phono and digital plugs with noticing any difference. I would get 2 Porter outlets, good value/cost and enjoy.

For trivial cost and virtually no effort, consider Machina Dynamica "Flying Saucers for unused AC outlets." Also, there is a companion version for window glass in the listening room (and, beyond).
These items outdid the benefits of power conditioners in my listening rooms, and allowed to be heard a quiet, clear and detailed sound similar to what can be heard in systems off the grid on battery power. There is no impairment of dynamics since nothing is within the AC power path. Appreciation of micro and macro dynamics is actually enhanced.
Then go right ahead with the planned dedicated line project and listen for any further improvement.

Several years ago I did a lot of wire (10/2) and outlet comparison testing’s (check out my older reviews and comments).
I concluded the following to answer your questions:
1) It's a personal matter of diminishing marginal returns.
2) I did not notice a difference in sound when my outlets were located close to each other or separated by six or eight feet or so, however there is nothing wrong with the idea of separation of outlets.
3) I did notice a difference in sound dynamic’s when using different high-end outlets and it's okay to mix and match different outlets and AC wire to create the desired sound you want to achieve.
Feel free to email me if you have specific questions.

In theory, separation of any cable is better than no separation, but whether or not it makes a big difference???

I have noticed a big difference in outlets. I started with Hubble hospital grade, then PS Audio Power Ports, which made a noticeable difference for my amp, but not as much for my source components. Recently I have installed a Watt Gate Gold (amp) and a Silver (sources) with definitely better sound than the Hubble, or PS Audio. Probably depends a lot on your particular system and incoming power as to how much improvement you would gain, but I am now a believer in outlet and power cords. They do make a difference.