I don't think you'd notice much, or perhaps any, difference in the finished appearance switching from BLO to tung oil.
This is partly going on general principles, where oils of similar types tend to give similar finish, and partly based on photos of pieces finished in both that I've seen. There's no basic difference that I can perceive. There could of course be a slight difference in colouring but only a direct comparison would highlight this, with wood varying naturally anyway.
And as a natural product each oil could vary in colour from maker to maker to begin with.
A specific aspect I would like to hear about is the difference in finished appearance and the difference over time.
Obviously you're asking about ageing characteristics here but this is going to partly depend on the wood it is applied to as well as the finishing regimen used (scraped finish or sanded, final grit used, number of coats applied, how much buffing was done and so on).
These variables may have as much to do with differences in reported performance as the different qualities of the oils themselves.
The main practical difference concerning application is that it takes more coats of tung oil to achieve the same surface gloss as fewer coats of BLO will give (source: Bob Flexner). So it's possible that some of the improved performance accorded to pieces finished with tung oil are due to a higher number of coats, not to the material itself being superior. I'm theorising here, I don't know. I have read numerous times that tung oil is more weather-resistant than BLO I've never read any actual data, and without it I don't believe we can trust that information.
Note: saying tung oil may also be a bit too general. Other than pure, "raw" tung oil there are some modified versions (partially polymerised to improve drying time). Additionally care must be taken to distinguish between actual tung oils and a "tung oil finish" which may contain no tung oil at all; in fact these can be little different to products sold under the name Danish oil (that is: a blend of oil with resin or varnish, with additional spirits).