but I will miss a sync service
You mean a symmetric service?
You are in the lucky position of being able to choose 1G/1G with Hyperoptic, or 1.8G/120M with EE or Zen. So basically it boils down to: which is more important to you, download speed or upload speed?
Personally I wouldn't notice the difference between 1G and 1.8G download, but I'd definitely notice the difference between 120M and 1G upload (if it were available to me, which it isn't)
Aside: Openreach has announced that they will start selling symmetric services from April, but only in certain areas to start with. They have said they will use existing GPON ONTs, which implies the upload speeds won't be any faster than 1G.