Hello and welcome!
Both are fairly similar kits in the sense that they use the same concept and very similar CNC parts, I wouldn't say one is better than the other but EPS has been around for a lot longer therefore we have sold more of those. Upgrading yours would also mean you need slightly bigger intake tubes as they have larger throttle plates so it's also worth taking that into consideration.
As you said, if it's going to be £500 to have the current ones fixed, it's just a case of weighing up the options and your future plans with the car. If you do plan a remap and are looking for some slight power gains in the future, you may as well upgrade them now instead of forking out the money to fix them with no extra benefits.
Also keep in mind, the throttle bodies are recommended for naturally aspirated builds with supporting mods to fully make use of the power gains. If you have plans to switch to forced induction anywhere in the future, it wouldn't make sense to go for these, you could utilise the funds for better and more efficient mods.
If you have any questions or need any advice, feel free to get in touch.