The thing with Hi Fi is - you buy a system costing 5k only to hear than another one costing 2k sounds as good as yours.
But if you’ve spent some time choosing the right system for you, that shouldn’t be the case. The only ways I see for this scenario to exist is to either build it blind based on price, or to buy a below average/poor £5k system and then hear a well chosen £2K system.
And then it’s down to what criteria “sounds as good” entails. The fact you’ll be hearing this cheaper system in a completely different environment will play a large part in how you perceive it, and if it is a different environment, it’s worth taking a little time to study that environment and see how it differs from yours - it could give you some ideas about changes you can make in your room to improve things, and maybe get your system sounding more like the cheaper one - if that’s really what you want.
It could just be that you’re hearing something “different”. I like different speakers for different reasons, and I’d sometimes take these cheaper options over more expensive ones just because they are different and produce a certain desired characteristic that I like. And this is responsible for some of the loudspeaker brand choices I make for the business - if someone comes to me saying they’re looking for a specific sound, or something that brings out the snare drum or some obscure request, I can say, “I have just the thing for you”, rather than having loads of brands that do things in exactly the same, conventional way and just differ in tonal balance.