SO8/SOIC8

STM8S0xx Value Line

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 10 bit	I/O	I²C	SPI	UART	VCC	t, °C
STM8S001J3	SO-8	16	8	1	128	2	3	5	1	1	1	2,95…5,5	-40…125

ultra low power STM8L0

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 12bit	Analog comparators	I/O	I²C	SPI	USART	VCC	LCD	t, °C
STM8L001J3	SO-8	16	8	1.5	2048	2	–	2	6	1	1	1	1,8…3,6	–	-40…125
STM8L050J3	SO-8	16	8	1	256	2	4	2	6	1	1	1	1,8…3,6	–	-40…125

Alalysis

STM8S001J3 - generic mcu. VCap pin reduces usable pins down to 5. Or 4 if you leave SWD. No MISO.
STM8L001J3 - same as STM8S001J. Same cost. But huge EEPROM. No ADC but there are analog comparators. No stupid Vcap pin. Much better.
STM8L050J3 - combines pros of prev ones for 150% price. 12 bit ADC instead 10 bit. Also DMA.

TSSOP20

STM8S0xx Value Line

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 10 bit	I/O	I²C	SPI	UART	VCC	t, °C
STM8S003F3	TSSOP 20, UFQFPN 20	16	8	1	128	2	5	16	1	1	1	2,95…5,5	-40…85

STM8S103/105 Value Line

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 10 bit	I/O	I²C	SPI	UART	VCC	t, °C
STM8S103F2	SO-20, TSSOP 20, UFQFPN 20	16	4	1	640	2	5	16	1	1	1	2,95…5,5	-40…85/125
STM8S103F3	SO-20, TSSOP 20, UFQFPN 20	16	8	1	640	2	5	16	1	1	1	2,95…5,5	-40…85/125

STM8S9хх - STM103/105 but with internal Vref ADC pin

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 10 bit	I/O	I²C	SPI	UART	VCC	t, °C
STM8S903F3	SO-20, TSSOP 20, UFQFPN 20	16	8	1	640	2	5	16	1	1	1	2,95…3,6	-40…85/125

ultra low power STM8L101

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	Analog comparators	I/O	I²C	SPI	USART	VCC	t, °C
STM8L101F2	TSSOP 20, UFQFPN 20	16	4	1.5	–	2	2	18	1	1	1	1,65…3,6	-40…85/125
STM8L101F3	TSSOP 20, UFQFPN 20	16	8	1.5	–	2	2	18	1	1	1	1,65…3,6	-40…85/125

ultra low power STM8L0

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 12bit	Analog comparators	I/O	I²C	SPI	USART	VCC	LCD	t, °C
STM8L051F3	TSSOP 20	16	8	1	256	2	10	–	18	1	1	1	1,8…3,6	–	-40…85

ultra low power performance-line STM8L151/152

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 12bit	DAC 12 bit	Analog comparators	I/O	I²C	SPI	USART	VCC	LCD	t, °C
STM8L151F3	TSSOP 20, UFQFPN 20	16	8	1	256	2	10	–	2	18	1	1	1	1,65…3,6	–	-40…85/125

Analysis

STM8S003F3 - most basic and cheapest one. Only 128 bytes EEPROM. 100 flash rewrites. For final mass production.
STM8S103F3 - Same as STM8S003F3 but more EEPROM. And 10k flash rewrites. For debuging.
STM8L101F2/STM8L101F3 - Just better than STM8S103F3 for same price. ADC is replaced to analog comparators. Not pin compatible to STM8S003F3/STM8S103F3
STM8L051F3 - Same as STM8L051J3 but more pins. 12 bit ADC, DMA. Awesome.
STM8L151F3 - Full flesh ... for 8kb flash. 12 bit ADC, RTC, analog comparators, DMA, internal Vref ADC & temp sensor, encoder api.

So we have 2 classes. 2 STM8S ready for drop in replacement. And 4 pin compatible STM8L.
STM8L - SWIM at pin 3, STM8S - SWIM at pin 18. Rest VCC, GND, NRST at same pins.

PDIP32

STM8S103/105 Value Line

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 10 bit	I/O	I²C	SPI	UART	VCC	t, °C
STM8S105K4	LQFP 32, PDIP 32, UFQFPN 32	16	16	2	1024	3	7	25	1	1	1	2,95…5,5	-40…85/125
STM8S105K6	LQFP 32, PDIP 32, UFQFPN 32	16	32	2	1024	3	7	25	1	1	1	2,95…5,5	-40…85/125

STM8S9хх - STM103/105 but with interal Vref ADC pin

Part No.	Package	F, MHz	Flash, kB	SRAM, kB	EEPROM, bytes	16 bit timer	ADC 10 bit	I/O	I²C	SPI	UART	VCC	t, °C
STM8S903K3	LQFP 32, PDIP 32, UFQFPN 32	16	8	1	640	2	7	28	1	1	1	2,95…3,6	-40…85/125

Analysis

Yeah! DIP is alive! But dont expect it will be cheap.
Get STM8S105K6 for breadboard prototyping. And STM8S903K3 if you need internal Vref pin for ADC.