The “best” blend of tea is very much a matter of personal taste. Everyone will probably recommend something different. Whenever this subject comes up on-line, Yorkshire tea seems to have particularly ardent partisans (looks up)- Yep, Rob’s there already.
That said, I can think of a few reasons why you got the results you did.
First and foremost, PG tips is never going to be a great tea. It’s a big mass-market volume operation, and isn’t really the highest quality (Side note- it used to be the higher quality brand from Brooke Bond. Their main brand no longer exists, and PG tips has moved down into its mass-market position). Take a look at the bag your teabags came in- is the bottom of it covered in tea dust? I expect so- a number of the lesser quality brands are noticeably “dustier”.
Edit- Oh, and I just noticed, You’re comparing one company’s Gold Blend,vs another one’s standard product.
Second, each blend is different- some are very strong and produce a very dark brew, while others are by nature a bit lighter. Whatever fits the way you like it
Third, tea tends to be blended to fit the local area’s water hardness. It could be that your local water is closer to that of the Irish consumer:
Fourth- my personal recommendation is for Clipper Tea, especially their Earl Grey blend: