HWH & SDAH requires 30 minutes in average in between. There are many cheap hotels around Sealdah. There is a railway lodge at HWH.
HWH has 23 platforms where SDAH has 17. Howrah is much bigger station than SDAH and the platforms are longer than SDAH too. Though SDAH seems to be busier because of EMU passengers. TTE and security personnel are very common in HWH which is slightly rare sight in SDAH. So, security is better in HWH.