Hello grah33
I don't think it's really possible to generalise with saying property will always do better than shares or vice versa.
Asset classes tend to be cyclical, ie there will be times when property will show strong capital appreciation and times when it will fall in value. Same with shares.
Example would be Sydney and Melbourne over the last couple of years having shown good gains, at least close to the CBD (not sure whether it applies in the outer suburbs?). At the same time, many regional areas which fell around 30% during the GFC, are still languishing at that level.
Then, if you're planning to rent a unit out, you'll need to do the calculations to see what yield you get after expenses, viz if you get $300 p.w. in rent, then deduct rates, insurances, water, maintenance, tax etc as well as your mortgage repayments, then with what is left consider that as a percentage of your investment price. (I'm not taking any consideration here of negative gearing because it's so long since I've done it I can't make any informed comment on that.)
I don't know what rents are like where you live, but I do the calculation every now and again here (regional coastal Qld.) and the net yield would be as little as 3%. Combined with no capital gains for some years now and no reason to think that will change, I'd prefer the money in the bank where there is no hassle of difficult tenants, having to arrange plumbers in the middle of the night etc.
The time when property is a great investment is when there is high inflation such as occurred in the late 70s and 80s. It was possible then to double your investment plus bring in high rents in a pretty short time.
Much more difficult now imo.
With shares, again you can't absolutely generalise. Even when the XAO (All Ordinaries) is down, maybe just because of some event globally, there will be a few shares that won't follow that trend. Ditto on an up move.
But there are plenty of sound companies with a solid track record of increasing profits, increasing dividends, low debt etc, that over the long term are fairly stable. That said, they all went down with the overall around 50% fall during the GFC.
Above I mentioned 'yield' on property investment. With shares this comes in the form of a dividend, plus franking credits. For the latter, the company has already paid tax on that proportion of their profit which comes to you as a dividend so you can claim that back from the Tax Office.
Currently, if we take most of the banks as an example, their dividend yield would be around 5% or a bit more, and you could add very approx about 2.5% for the franking credit = grossed up yield of over 7%.
Not all companies pay a dividend and not all dividends are 100% franked.
Liquidity has also been mentioned above. If you might need the money out for any reason, or if you just decide to sell some shares in order to buy something different, then you can do it immediately. Far more complicated to sell property with leases, agents etc to deal with.
For background on how the sharemarket works, the Australian Stock Exchange has an Education section in the form of modules which you can work through, then self test at the end of each one.
www.asx.com.au
Hope this helps a bit.