Interface 

Both Triond and RedGage uses flash to build its interface.   Presentation is good but I found that I often have time when I could not access either service.  With your own blog, you have better control over what interface is used.  I personally use Blogger and have occasionally also have problems connecting.    So all the services encounter similar connection problems.

Earning 

It is possible to get earn money in all three options.

Personal Blog

Earning 

With your personal blog every you earn belongs to you.  However, the challenge with the personal blog is you have to keep your blog focused and also constantly update it.  Otherwise, you will lose the momentum and some of your regular readers.  In addition to that, you may also opt to pay for your own domain and also pay for the hosting service.  All these will be additional cost.  If the earning does not cover the overhead, you end up losing money.

Withdrawal 

If you are like me where getting the money from adsense, it is rather tough.  You need to wait until you earn at least US$100/- before you can get the money.

Triond

Earning 

One of the things about earning money in blogs is to stay focused in a niche.  If the niche has a lot of interest, that is where you can earn more money.  This is where Triond shines.  It has multiple domains which are specifically focused so it makes it much easier drive traffic.  Also due to its communities, each domain is constantly updated.   So it is good for driving traffic to your work from within the community as well as other readers outside the Triond community.

One of my issues I have with Triond and is probably the same problem with other sites is articles with lots of images.  I submitted one and it was published without the images which cause it to lose its effect.  I informed Triond and it was fixed promptly but soon after the images disappeared again.

Withdrawal 

One key benefit for Triond in my book is that you can withdraw the money PayPal and the minimum cut off is 50 cents.    This allows you to get your money faster.

I have received the payment from Triond and I must say, the process is very simple and hassle free.

RedGage

Earning 

I like RedGage because the articles you write with the first two options can be used with this option.  That means you can earn money from both sources.  Also, you earn points and money for all your activities within the site.  However, because everything is within that one domain, it is much tougher to get readers who have niche interest.  One other interesting gimmick that is unique within this site is the daily, weekly and monthly raffles which allows you to earn extra money.

I feel that the focus is for interaction within the community.   Also some may not like the fact that their earning is posted for all to see.

Withdrawal 

You can withdraw your earning only when the amount earned exceeds US$25/-.  Which is still lower than the limit required from personal blog (i.e. direct from google).    However, it will be sent to you via a prepared credit card.  There are some fees such as US$5/- for the card and additional 5% fee for each withdrawal.  That means you will be getting less that what you earned. 

I have not received any payment from RedGage yet since I just joined and am not sure how smooth the payment process is.

Conclusion

If you do not have the time to sustain a blog and write regularly as well as stay within a specific topic, then the last two options are much better.   The first option has the potential to make money faster but requires a lot more focus and work.