Technically there is no difference. I have wondered many times why people want to launch a new coin instead of taking over a dead coin and revamping it. That however is a long discussion over a few beers and is probably related to there being an existing coin holding and there is a bigger rush, hype and excitement during a new coin launch. What differentiates one coin from another with similar specs is the dev team and the resources behind it. If you have a trustworthy dev team that is dynamic, sincere, honest and is skilled, a coin has the potential for success. If the coin is adopted by the public and used it will be successful. It seems that the Swift dev team has some of those characteristics in judging their actions so far and is also supported by the 5 star PoD (depending on ow much value you want to place on that process though). A coin can however also be insta-killed by the the dev team eg. if the dev disappeared or dumps and runs, or does something stupid etc. Processes like the PoD is there to give limited assurance that the risk is lower for that to happen. In addition, the plan and roadmap includes certain futures and functionality that are ambitious and scarce so far. Having said that, the proof is in the eating, meaning that the services have to be delivered and adopted to create real value. So far the delivery seems to be on track which supports the current price. If delivery slips or the services not adopted the price will reflect that. The ICO also generated 320 BTC for the dev team that if used wisely can produce features/functionality that is expensive to develop and if they pay a premium, with a faster time to market. Regarding your question on how long it will last? It depends on how long a piece of string is.
Read my post a few posts back for the pros and cons for staking vs leaving on an exchange. In short though, staking (proof of stake) is the process of leaving your coins in a wallet on your device/PC whereby the wallet does the verification/processing work that a typical mining machine does in the case of proof of work. It is a function of the amount of coins in your wallet and how long they have been in your wallet without moving addresses. For this distributed processing work you are rewarded with some dust if you "solve a block". There is a lot of literature on the Internet for a technical explanation of how POS work. Whether you leave your coins in Bittrex or in your wallet is a decision you have to make for yourself based on the factors I mentioned in my earlier post.
Thanks jc12345 , yes I read your post back and I understood, I thought I did have to move my coins to get an stake, I thought I had to. Now its clear. thanks again