I Need your advice-Macbook pro or Imac for Video Editing?

I would like to know which one between this Macbook pro and this Imac is the best for video editing?

Macbook Pro:

• 17 Inches
• Intel core i7
• Processor 2.4 GHz
• 4 cores
• Ram 4 GB (ex to 8GB) 
• 750 GB Hard drive
• Graphic:  Intel HD 3000 & AMD Radeon HD 1 GB GDDR5
• Cache 6 MB Shared L3

Imac:

• 27 Inches
• Intel core i5
• Processor  3.1 GHz
• 4 cores
• Ram 4 GB (ex to 16 GB)
• 1 TB hard drive
• Graphic:  AMD Radeon HD 6970M
• Cache 6 MB Shared L3

Could someone please give me advice?