IMO extremely different products, cannot directly compare.

Belfield
- Higher density >1k units, likely to be lower maintenance fees on average than Alishan
- Very near city centre but not directly linked to mall
- Unit sizes are smaller, cheaper total unit price
- Near monorail which is not the best public transport around
- More appealing to urbanites who want to live in close proximity to city centre or work in the nearby area, and don't mind the modest size units.

Alishan
- Low density, based on density and facilities it's very likely to have high maintenance fees
- More on the fringe side of KL so it's a bit quieter, surrounding area is mostly residential
- Very big units, total cost per unit is going to be higher (and total maintenance fees also, because bigger total sqft per unit)
- Current retail price of Alishan is easy more than 10% higher psf compared to nearby properties, very expensive
- Nearby mall is not a fully matured mall, but can get groceries and daily use things very easily.
- Near MRT also (mall direct link bridge to MRT) so quite convenient public transport if you use
- The offered furnishing package very fancy
- Target market are bigger families (multigenerational) with bigger budget.

Opus further down, not as near as Belfield

🤔 I remember Opus main entry is after the Magnum shop, Belfield is come down from monorail then turn right

IIRC tiger bank largest shareholder is PNB, and hearsay is tiger bank's building is getting old, so they'd like to move to a bigger space with better facilities. But have to decide what to do with current tiger bank tower.

The huge graveyard will be the most difficult part.