I too own Swarovskis. All I have at this time are in the Z3 line (3-9x36 and 3-10x42's). I did have a Z5 3.5-18x44, but have sold it.
The glass is great, and they are light scopes (a bonus on a hunting rifle). And the price of the Z3 scopes has dropped dramatically after the higher lines came out, making them more price point available to the average hunter who doesn't have as deep of pockets for these top tier scopes.
I do prefer the older TDS reticle to the newer BRH reticle (the larger dots in its configuration detract from its use for me).
Have to admit that I do prefer the Leupold B&C reticle...could be because I have more of them and have used them for more years.
The advantage for me, on my hunting rifles, is that Swarovski aluminum scopes caps are more expensive, and they do not make them for all their scopes' lense sizes (???). While the Leupold's are not exactly cheap, I do like them better. When open, they can fold flat to the scope. This will help them from snagging when moving through the thick bush.
I also like the Kahles scopes I have, and hope to find a couple more of their older hunting scopes w/ TDS reticles. Greta scopes; light weight with great low light resolution. Too bad we can only find their higher end tactical scopes today.
At the end of the day, it will come down to where and how a person hunts with the rifle, and the attributes most important to the shooter for the application.
Weight, size, magnification, etc.
I wouldn't hesitate to recommend either of these scopes, if you come across one that will suit your needs and desires. But as you were leaning towards Leupold, that was why I stuck to that brand in my first post.
For me, I have various rifles set up for various hunting scenarios, and the scopes are matched to the rifle for these purposes.
For close range work in the brush, where high end magnification isn't always needed, a lower low end magnification is a bonus for field of view, and ability to see the entire animal and track it as it moves through the forest. This is why I went with the VX-5HD in 2-10 on the 338 Federal, as there may be instances where I will end up in larger meadows or on a cutline while hunting the thick bush.
For those where it will be more open terrain hunting, I do not need as low of magnification on the bottom end of the scale, and may need more magnification (10-14 power) for longer shooting distances. And this is where I am looking at the VX-5HD in 3-15 for the 6.5 PRC.
In overall consideration of weight, balance and protection, I stick to objective lenses of no larger than 44 mm for my higher magnification scopes.