Trachy Fortuneii or Wagnerianus?

I bought this palm on a market stall 10 years ago when it had just two tiny leaves and about 10cm tall. The seller didn't have a clue what it was but I just liked the look of it.

It has lived in a container until last year until it became totally pot bound - no idea how it survived as there was not a scrap of soil left when I tipped it out! It has been in the ground for the last 8 months and seems quite happy and putting up new central growing spears. 

I'd appreciate some help identifying it as if it's a Fortuneii it might end up sky high but if it's a Waggie, hopefully it will stay more bush like.

Many thanks.