[Ethereum] Does Ethereum have a payment URI like Bitcoin

I am just summing up some points found on various website and forums, thanks to original authors.

1. While both the technologies focus on financial market and are based on a cryptographic blockchain with several programmatic features, they still differ significantly in many areas. For instance, Bitcoin is basically a cryptocurrency which was designed to replace the notes and coins in your pocket with a much reliable and easily available internet-based alternative. Whereas, Ethereum is a programmatic platform that can be utilized to build, deploy and implement ‘smart contracts’ equally contributed by human and computer counter-parties.

2. Both Bitcoin and Ethereum serve as currencies, they serve different purposes. Where Bitcoin is intended to be a general purpose currency, Ethereum’s Ether (its own internal currency) is used specially to finance the internal processes of Ethereum. In short, Bitcoin can be seen as an alternative currency whereas Ethereum is said to be the alternative law.

3. Both use encryption and time-stamping.

4. All transaction processors come to an agreement in Bitcoin about what happened and when according to the transmission and storage of the Bitcoin value token. Whereas, the same is taken care of by Ether in Ethereum, along with the agreement about all processing done in all shared programs on Ethereum World Computer.

source: A3logics

Another discussion in Quora

Ethereum Wallet and Mist share the same source repository (https://github.com/ethereum/mist). Mist is a wallet enabled browser, and "Ethereum Wallet" is Mist but with the browser capability disabled, so you can use it as a wallet. I don't know about recent version but at some point you were able to switch between them with a command line option.

Mainnet y testnet are two independent blockchains. They use the same type or private keys, so you can use the same "address" in both, but you cannot exchange funds or tokens between the blockchains, each blockchain has its own independent state.

Ownership of a contract can mean different things. There's the address that has deployed the contract, but it has no other special properties over the contract, unless it is coded in the source code.

Ownable is common pattern used where there contract declares an special owner. Initially assigned to the deploying address, but it can be changed later. It provides a modifier to restrict access to critical methods only to the owner of the contract.

I'm no sure but I think Ethereum Wallet/Mist has a separate storage for mainnet/testnet, so you can switch between them without problem. But in any case proper care should be taken, make sure to backup your keys when switching because some operations cannot be reversed in case of a mistake.

Thanks to Thomas Jay Rush for confirming the separate storage for mainnet and testnet in Mist/Ethereum Wallet.