Which SSD to replace these laptop HDD's?

[BillHicksRIP]

I've got a beefy laptop (Aspire V3-772G i7-4702MQ 2.2Ghz, 32GB) that I use as a mobile server and mainly use it for creating and trashing VMs with the need to run 4 or 5 VMs at a time. I'm used to running SSDs at home so the speed of the drives in the laptop is getting on my nerves a bit. I'd like to retain on of the ones below for mass storage and replace the other with a 500GB SSD. Alternatively, I came across the Samsung portable USB 3.0 SSDs recently. Would the performance of the portable SSD come anywhere close to an internal 2.5 SSD?

Seagate ST1000LM014 1TB SSHD 2.5Gps (Boot Drive)
WD Blue WD10JPVX 1TB 5400 RPM 8mb Cache Sata 6Gps

Any opinions appreciated