3.7（代码名称 Indigo ）和3.8是错误修复和稳定版本，而4.0,4.1,4.2（代码名称 Juno ）是新功能集成熟平台版本。版本3.8和4.2正在同步进行。您可以在eclipse项目计划这里找到更多。 Juno具体计划可以在此处找到。

I see there are two main distributions of Eclipse going on - One is on 3.6, 3.7, 3.8 path and the other is 4.0, 4.1 path(http://www.eclipse.org/e4/).

I don't have clarity on what is the difference between these two distributions?

3.7 (code name Indigo) and 3.8 are bug fixes and stability releases whereas 4.0,4.1,4.2 (code name Juno) are new feature set mature platform releases. Release 3.8 and 4.2 are going on simultaneously. You can find more on the eclipse project plans here. Juno specific plans can be found here.