So, it turns out, the new system did come with a new Boot ROM version and SSD & memory manufacturers. Graphics looks to be the same between the two.
OLD:
Model Name: MacBook Air
Model Identifier: MacBookAir6,1
Processor Name: Intel Core i7
Processor Speed: 1.7 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 8 GB
Boot ROM Version: MBA61.0099.B04
SMC Version (system): 2.12f135
Physical Drive:
Media Name: APPLE SSD SD0256F Media
Medium Type: SSD
Protocol: PCI
Internal: Yes
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. Status: Verified
Memory Slots:
ECC: Disabled
BANK 0/DIMM0:
Size: 4 GB
Type: DDR3
Speed: 1600 MHz
Status: OK
Manufacturer: 0x02FE
Part Number: 0x000000000000000000000000000000000000
Serial Number: 0x00000000
BANK 1/DIMM0:
Size: 4 GB
Type: DDR3
Speed: 1600 MHz
Status: OK
Manufacturer: 0x02FE
Part Number: 0x000000000000000000000000000000000000
Serial Number: 0x00000000
Intel HD Graphics 5000:
Chipset Model: Intel HD Graphics 5000
Type: GPU
Bus: Built-In
VRAM (Total): 1024 MB
Vendor: Intel (0x8086)
Device ID: 0x0a26
Revision ID: 0x0009
Displays:
Color LCD:
Display Type: LCD
Resolution: 1366 x 768
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
Connection Type: DisplayPort
NEW:
Model Name: MacBook Air
Model Identifier: MacBookAir6,1
Processor Name: Intel Core i7
Processor Speed: 1.7 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 8 GB
Boot ROM Version: MBA61.0099.B07
SMC Version (system): 2.12f135
Physical Drive:
Media Name: APPLE SSD TS0256F Media
Medium Type: SSD
Protocol: PCI
Internal: Yes
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. Status: Verified
Memory Slots:
ECC: Disabled
BANK 0/DIMM0:
Size: 4 GB
Type: DDR3
Speed: 1600 MHz
Status: OK
Manufacturer: 0x80AD
Part Number: 0x483943434E4E4E384A544D4C41522D4E544D
Serial Number: 0x00000000
BANK 1/DIMM0:
Size: 4 GB
Type: DDR3
Speed: 1600 MHz
Status: OK
Manufacturer: 0x80AD
Part Number: 0x483943434E4E4E384A544D4C41522D4E544D
Serial Number: 0x00000000
Intel HD Graphics 5000:
Chipset Model: Intel HD Graphics 5000
Type: GPU
Bus: Built-In
VRAM (Total): 1024 MB
Vendor: Intel (0x8086)
Device ID: 0x0a26
Revision ID: 0x0009
Displays:
Color LCD:
Display Type: LCD
Resolution: 1366 x 768
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
Connection Type: DisplayPort