Wallys/WiFi 6E (802.11ax) QCN9074 IPQ6010/What’s the difference between the DR6018 and the DR6018-S Routerboard?

One may quite confused about the difference between the 2 routerboad:DR6018 and DR6018-S.As the Absolute Maximum Rating data almost the same as listed below. With almost the same Absolute Maximum Rating data.
ParameterDR6018DR6018-SUnit
Supply Voltage24V~4824V~48V(DC Jack)V
Operating Temperature Range-40 to +70-40 to +70oC
Storage Temperature Range-45 to +105-45 to +105oC
Operating Humidity Range5 to +95 (non-condensing)5 to +95 (non-condensing)%
The difference between these 2 router board(DR6018 and DR6018-S) mostly shown on the Hardware Specifications listed as below.1.Ethernet Port.The DR6018 have 5 Ethernet Port:1x2.5G,3x1G,1x1G;while the DR6018-S have 2 Ethernet Port:2x1G. 2.USB /header.The DR6018 equipped with 1x USB 2.0 Port;while the DR6018-S equipped with 1x USB 3.0 Port(Option).3.DC Jack.The DR6018 equipped with 24V power supply;while the DR6018-S equipped with 24V~48V power supply.4.DDR.The DR6018 equipped with 1GB DDR;while the DR6018-S equipped with 256MB~512MB DDR.5.Dimension. The size of the DR6018-S is smaller than DR6018.  See below the compare form for your reference.
SymbolDR6018DR6018-S
CPUQualcomm-Atheros IPQ6010Qualcomm-Atheros IPQ6010
CPU FrequencyQuad-core ARM 64 bit A53 @1.8 GHz processorQuad-core ARM 64 bit A53 @1.8 GHz processor
System Memory1GB (2x 512MB) DDR3L 16-bit interface with 32-bit memory bus design1GB (2x 512MB) DDR3L 16-bit interface with 32-bit memory bus design
Ethernet Port1 x 1Gbps Ethernet Ports & POE3 x 1Gbps Ethernet Ports , 1x 2.5Gbps Ethernet Port1 x 1Gbps Ethernet Ports & POE 1x 1Gbps Ethernet Ports
NGFF SlotM.2 (NGFF) “E Key” Socket with MiniPCIe 3.0M.2 (NGFF) “E Key” Socket with MiniPCIe 3.0(For WiFi Module)
SD Card Slot1x SD Card Slot1x SD Card Slot(Option)
USB /header1x USB 2.0 Port1x USB 3.0 Port(Option)
POE24V~48V passive POE/Active POE(Suport 802.3bt)24V~48V passive POE/Active POE(Suport 802.3bt)
DC Jack24V power supply24V~48V power supply
LED headerFFC/FPC Connector2.0 pitch pin header
Serial Port1x Serial Port 4 Pin Connector1x Serial Port 4 Pin Connector
WirelessOn-board 2x2 2.4GHz MU-MIMO OFDMA 802.11b/802.11g/802.11n/802.11ax, max 23dBm per chainOn-board 2x2 2.4GHz MU-MIMO OFDMA 802.11b/g/n/ax, max 23dBm per chain
On-board 2x2 5GHz MU-MIMO OFDMA 802.11a/n/ac/ax, max 20dBm per chainOn-board 2x2 5GHz MU-MIMO OFDMA 802.11a/n/ac/ax, max 20dBm per chain
4 x MMCX Connectors4 x MMCX Connectors
Bluetoothoptional
Nor Flash8-32MB(normally is 8MB)8MB
Nand Flash256MB256MB
DDR1GB256MB~512MB
Dimension 185mm x 116mm125mm x 105mm x 20mm
Click the links below for more information about DR6018 and DR6018-S.https://www.wallystech.com/Routerboard/DR6018V4-wifi6-Qualcomm-IPQ6010-IPQ6018-FAMILY-2T2R-2.5G-ETH-port-supporting-5G-celluar-Modem-802-11AX-MU-MIMO-OFDMA.html https://www.wallystech.com/Routerboard/DR6018-S-V02-wifi6-Qualcomm-IPQ6010-2T2R-2-GE-port-supporting-QCN9074-wifi-card-802.11AX-MU-MIMO-OFDMA.html Wallys Communications (Suzhou ) Co., LTD is mainly engaged in the research and development and production of wireless communication products,such as Routerboard,Network Card,Industrial Wireless AP,Antenna etc.OEM/ODM/JDM services for customers supported. With our experienced R&D engineer team,which with a demonstrated history of working in the wireless industry,you can explore the project with RF and embedded communications,network protocol,firmware,openwrt,linux system,development,analog and Digital Circuit Design,Network Processors,Power supplies,PCB design and layout with us.Welcome to email us for more information.Email:sales1@wallystech.comhttps://www.wallystech.com/