How do advent trade ports (converted to refineries) compare to dedicated TEC and Vasari refineries? Once converted do they bring in the same amount of resources/second or are they inferior?
TEC and Vasari refineries affect multiple plans and their rocks, don't stack past 3, and are not affected by loyalty or extractor upgrades or planet bonuses. As a result, the comparison varies a bit.
A basic extractor at 100% loyalty earns ~0.5 resources per second, and so an 8% boost would give you 0.04 resources / second. This means that basic resource focus does indeed give less than a refinery. You'd need to double its efficiency in order to make it match a refinery (just in the boundaries of that one gravity well).
Supposing my 35% value, each extractor in a resource focus well would give you 0.18 resources, meaning a Vasari/TEC refinery would need to affect about twice as many extractors than the resource focus trade port in order to match it. Seeing as the maximum number of rocks a resource focus port can affect is 4, I think it's pretty easy to hit 8 with refineries. So yeah, even with my massive buff resource focus is still inferior to refineries.
In your 0.08 calc for refineries is that just for 1 refinery?I thought the closer you get to the quota the more effiecient they become?
Yup, I read up on refineries and then did a quick test in game. It's 0.08 per rock (a little more for neutrals), and it's additive for every additional refinery up to the quota.
By the time you can get refineries its prolly much more cost effective to get the tec that makes blackmarket cheaper.
Actually, that's fair enough, let's use 4:1 rather than 4.5:1 with respect to refineries. So presuming you have 8 rocks you get 0.64 resources per refinery, which at a 4:1 rate gives you 2.56 credits per second. For trade to exceed that, you'd need a 10 link trade route. That's actually quite doable, but not so low as to be easily accessible, but it does demonstrate that even in this situation refineries may not be that great.
The big problem is that at a certain point trade ports are exponential and uncapped while refineries are linear and capped. No matter what, there eventually comes a point where trade ports are just plain better than refineries. Where should that be? Currently for an 8-rock position it's a 10-jump trade route. Honestly, I think this is within the low range of what is reasonable. I still agree with you that refineries are second rate, but I'd use 'em frequently if they'd just cost less.